title: Inhibition of serum androgen levels by chronic intranasal and subcutaneous administration of a potent luteinizing hormone-releasing hormone (LH-RH) agonist in adult men.
abstract: The effect of chronic treatment with the luteinizing hormone-releasing hormone (LH-RH) agonist Buserelin (Hoechst AG, Frankfurt/Main, West Germany) ([D-Ser(TBU)6,des-Gly-NH2(10)]LH-RH ethylamide) administrered by nasal spray (200 or 500 micrograms, twice daily) or subcutaneously (50 micrograms daily) for periods of 1 to 8 months was studied on serum sex steroids and LH levels in 18 patients with cancer of the prostate. Basal serum testosterone concentration decreases to 71.1 +/- 18.3 (NS) and 28.6 +/- 9.3%, (P less than 0.01) of control in patients receiving the 200-micrograms and 500-micrograms dose by nasal spray, respectively. In patients treated subcutaneously, a more rapid inhibition of serum testosterone levels to 19.6 +/- 6.4% of control (P less than 0.01) is observed. The finding of decreased levels of 17-OH-progesterone, testosterone, and dihydrotestosterone in the presence of unchanged pregnenolone concentration indicates that the decrease in androgen biosynthesis induced by Buserelin treatment is due to a blockage at the level of 17-hydroxylase and 17,20-desmolase activities. The present data indicate that chronic administration of Buserelin could be a safe and effective means of reducing serum androgens in patients with cancer of the prostate.
mesh_terms: D000281:Administration, Intranasal; D000368:Aged; D002064:Buserelin; D013196:Dihydrotestosterone / Q000097:blood; D004958:Estradiol / Q000097:blood; D007987:Gonadotropin-Releasing Hormone / Q000031:analogs & derivatives* / Q000627:therapeutic use; D006801:Humans; D006908:Hydroxyprogesterones / Q000097:blood; D007279:Injections, Subcutaneous; D007986:Luteinizing Hormone / Q000097:blood; D008297:Male; D008875:Middle Aged; D011471:Prostatic Neoplasms / Q000188:drug therapy*; D013739:Testosterone / Q000097:blood*; D013997:Time Factors
chemical_list: D006908:Hydroxyprogesterones; D013196:Dihydrotestosterone; D007987:Gonadotropin-Releasing Hormone; D013739:Testosterone; D004958:Estradiol; D007986:Luteinizing Hormone; D002064:Buserelin